Temperature controlling device for internal combustion engines



E. J. HALL Feb. 3, 1931.

MPERATURE CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Oct. 30, 1924 3 Sheets-Sheet l 6H0: new

E. J. HALL 1,790,812

TEMPERATURE CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINEs Feb. 3, 1931.

3 Sheets-Sheet 2 Filed 001:. 30, 1924 Feb. 3, 1931. J, HALL 1,790,812

TEMPERATURE CONTROLLING DEVICE FOR INTERNAL COMBUSTION ENGINES Filed Oct. 30, 1924 3 Sheets-Sheet 5 Patented'Feb. 3, 1931 UNETE .TsrAr'as PA'rstzr ELIBERT .J, HALL, OF PIEDMONT, CALIFORNIA Application filed October 30, 1924. Serial No. 746,896.

The invention relates to a temperature controlling device for regulating the tempera ture'or" the fuel mixture delivered to an internal combustion engine. Due to high efiiciency that it isnecessary to obtain in internal combustion engines at the present time, itis necessary to use high compression. Due tousi'ng this high compression, it is necessary to have a very sensitive temperature control on the carbureting de vice used in connection with the same. The carbureted gas temperature desirable under ordinary working conditions is about 150 F. However, under extreme conditions encountered in commercial workfit is desirable to have the carbureted gastemperature as low as possible in the carbureting device due to the fact that the carbureted mixture will pick up the necessary heat in; passing through the valve chambers and cylinder 7 head due to overheating'of the cooling system. It is also desirable in a carbureting-s'ystem to have the. arrangement of heat application so that the atomized fuel will receive the heat from the exhaust gas immediately during'the first starting or the engine when cold, which would allow raw fuel to be drawn over into the cylinders causing. dilution of the lubricant. This carbureting temperature control device consist-sot a carbureting chan j her surrounded with' a hot gas chamber, the hot gas being received from theexhaust manifold and the amount of hot gas controlled by a thermostat which can be set to give the desired temperature in this chamber. Manual means are also arranged so "that the entire exhaust gas can be put threugh this hot chamber or the hot gas can be shut ofi entirely from this chamber to cover extreme conditions such as extreme cold or hot weather conditions. I i I 1 lVith these and other objects in view the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and pointed-out in the claims hereto appended, it being under stood that various changes in the form, pro port on and minor 'detailsof construction, within the scope of the claims, maybe reinvention.

In the drawings sorted to without departing from the spirit or sacrificing any of the advantages of the.

/ Figural is-aside'elevation of a tempera tureo controlling device constructed in ac cordance with this invention and shown applied to an internal combustion engine.

Figure 2 is an enlarged 'longitudinalsectional view device.

of the temperature controlling Figure 3 is a plan-view of the device; Figure 4 1s a horizontal sectional view through the hot gas chamber. 1

Figure 5 is a 'horizontalasectional view through the thermostat receiving section,

illustrating. the arrangement of the valve.

' Figure 6 is a detailed sectional View of the tion.

' Inthe accompanying drawings in which exhaust pipe, illustrating the arrangement of the outer casing of the intervening insulais illustrated the preferred embodiment oft-he inventiom l designates ail-intake pipe connecting the'carburetor 2 of an internal combustion engine 3 with the intake'manifold 5'2 thereof. The intake pipe is provided preierably at a point immediately above the carburetor '2 w'itlia thi'navalled section: 5 arranged within and surroundedby'a hot gas chamber 6, and preferably constructed oi copper or some other suitable material of high seat conductivity. The hot air cham her 6' is formed by an outer shell or casing? surrounding the thin walled section and connected at its upper portion at one side with a branch 8 of an exhaust pipe 9a,

The brancl 8 of the exhaust pipe may be connected with the casing 7 at any'other desired'peint' and thesaid casing is enlarged atone side at the upper portion at 10 t0 receiveth-e' branch pipe 8. The said casingis also preferably enlarged at the QPPOSltQ side at the lower portion'at 1-1 to afford a convenient conncc tion for a discharge pipe 12 for conducting the exhaust gases from the hot surroundin the inlet 'i e. i

gas chamber The exhaust pipe 9a and the exhaust manifold 13, are insulated to prevent'heat from radiating from the exhaust manifold and the exhaust pipe with its branch 8, and aflecting the temperature conditions of the internal combustion engine. This will render the temperature controlling device more sensitive and will increase the range of operation of the temperature controlling device. In other words, the inlet pipe may be supplied with a maximum amount of heat from the exhaust pipe or the heat from the exhaust pipe may be entirely :cut off from the inlet pipe or any intermediate condition may be maintained from such extremes. The in sulation of the exhaust manifold and the exhaust pipe and its branch 8, may be effected b an suitable means such as b" rovidin .l a

an outer casing 14 of aluminum or other suitable material and a filling, packing or the like. For convenience of illustration, also for efliciency, a corrugated insulation member 15 is shown for providing an intervening air space between the outer casing and the exhaust manifold and exhaust pipe. The branch pipe 8 is equipped with a manually operatedvalve 9 for controlling the passage of the exhaust gases through the branch pipe 8 from the exhaust pipe 9a to the hot gas -chamber 6, and the exhaustjpipe may also be provided with any suitable means beyond the juncture of the same with the branch Ssuch asia valve 10a for enabling all of the exhaust gasesfrom the engine to be passed through the hot gas chamber when necessary or desirable. By this construction a complete control and elimination of the exhaust gases from the hot gas chamber and inlet pipe. to a passage of all of the gasesof the exhaust of the engine through the hot chamber may be obtained. -Any suitable means may be provided for operating the valve 9, which is shown of the pivoted butterfly 'type, butany other desired construction may of course be employed. V

The exhaust gases passing through the hot gas chamber and impinging against and heating the inlet pipe 5 are automatically controlled by means of a thermostat 16 located within a section 17 of the discharge pipe 12.and connected with and actuating a valve 18, which cooperates with a valve seat 19 at the upper end of the discharge pipe 12. The valve 18 controls the outlet opening 20 in the lower enlargement 11 of the outer shell or casing 7. The'thermostat is mounted on a lug 21projecting interiorly from the section 17 of the discharge pipe and receiving a stem 22 of the thermostat. The stem 22 is threaded for a nut 23 which secures the stem in the opening 24: of the lug 21, but it will be apparent that the thermostat may be mounted in any other desired manner. The upper end of the thermostat is provided with a stem 25 suitably secured to the valve 18,

which operates in a suitable guide and support 26 located at the upper end of the section 17 of the discharge pipe 12, but the valve may be constructed and mounted in any other preferred manner. The thermostat. while being arranged in the path of the exhaust gases discharging from the hot gas chamber is located exteriorly of the hot gas chamber and may be constructed of material commercially practical owing to the location of the thermostat in a relatively cool portion within the discharge pipe and thereby avoiding the high temperatures to which the thermostat would be necessarily subjected if located within the hot gas chamber. The thermostat may be set for various temperatures as will be readily understood and when r it is desired to maintain the aforesaid 156 F.

of the inlet pipe, the thermostat will be set for approximately 160 F. and will. close the valve 18 and prevent the passage of exhaust gases through the discharge pipe and through the hot gas chamber when the temperature exceeds that degree. The valve 18 is purely automatic in its operation and is independent in; its operation of the valve 9 of the branch 8 of the exhaust pipe, the valve 9 being designed particularlyfor use in the extreme conditions heretofore pointed out. Also by locating the thermostat within the discharge pipe, it is not only out of the, way, but it entirely eliminates the trouble and inconvenience of locating such an element exterio-rly of the pipe in which the valve actuated by its is arranged.

lVhile a valve may be employed in the ex haust pipe beyond'the branch pipe for positively causing all of the exhaust gases to pass through the hot air chamber under ordinary conditions, the resistance offered. by the muflier with which the exhaust pipe will be equipped will be ample to cause'the desired flow of the exhaust gases through the branch pipe and the hot air chamber.

What is claimed is: 4 v V 1. A temperature controlling device including an inlet pipe locatedbetween the carburetor and the engine and forming a passage for the fuel mixture, a hot gas. chamber surrounding the inlet pipe and having at one side an upper inlet and at the other side a lower outlet, means for conducting exhaust'gases from the engine to the inlet of the said chamber, said chamber permitting the gases to circulate entirely around the inletpipe and discharged at the said outlet, and means exterior to the said chamber and located beyond the outlet thereof in the direct path of and regulated by the discharging exhaust gases after the same have passed hrough the outlet of the hot gas chamber and have left the latter. for controlling the passage of the exhaust gases from the hot gas chamber and the temperature of the intake pipe. 1

' 2. A temperature "controlling" device iii-- eluding an inlet pipe located betweenthe c'ar buretor and the engine, a, hot-gas chamber surrounding the inlet pipe and provided at one side at the" upper portion With'an inlet and at the opposite side at the lower, portion with'an-o'utlet, an exliaust'pipe having a branch connected with the inlet of the hot gas'chamber for delivering exhaust gases to the samefor heating the inlet pipe, and means exterior to the hot gas chamber and located beyond the outlet n the direct path of and 'regulated by the discharging gases after the ture of the intake pipe.

same have passed through the outlet of the hot gas chamber and have left the latter for controlling the discharge of exhaust gases from the hot gas chamber and the tempera- 3. A temperature controlling device for "internal combustion engines. including an iiilet'pipe located between the carburetor and the engine, a jacket'surrounding the inlet pipe and carrying a section of the same and provided at the upper portion at one side with'a'n inlet and at the opposite side at the lowerportion with an outlet, said jacket forming a hot gas chamber andfpermitting the hot gases to circulate entirely around the inlet pipe, an exhaust pipe having a branch connected With-theinlet of the jacket for delivering exhaust gases to said chamber for heating the inlet pipe,and means exterior to the jacket and located beyond the outlet there of in the direct patl of and regulated by the discharging gase's'a'fter the same have passed through the outlet of the hot gas chamber and have left the latter or controlling the passage of exhaust gases'froin the hot gas chamber and thetemperature of the inlet pipe.

I permitting the hot gases to circulate entirely around the inlet pipe, an exhaust pipe having a branch connected with the said iacket,

for delivering exhaust gasesto the said cham her for heatingthe inlet pipe, means exterior to the said jacket and located beyond the said outlet in the direct path of and regulated by the discharging gases after the same have passed through-the outlet of the hot gas I chamber and have left the latter'for control- V ling the passage of the exhaust gases from thehot gas chamber and the temperature of the inlet pipe, and a manually operable valve arranged within said branch for controlling the passage of the hot gases to the casing in.

extr me conditions and capable of also closing the'branch pipe to the exhaust gases.

5. Ateniperature' controlling device in cluding'an'inlet pipe-located between the carburetor and the engine, a hot gas chamber surrounding the inlet pipe andprovided the upper portion at one sideiwith an inlet and at the opposite side at the lower portion with an outlet, an exhaust pipe having a branch connected with the inlet of the hot gas chamber for delivering exhaustgases to the 7 same for heating theinlet' pipe a Val-V9191 w catedexteriorly oi the outlet and beyond the same "and cooperating withthe same, and thermostaticallyactuated means located ex teriorly of the hot gas chamber andbeyond V in i the valve in the" direct path-of and regulated by the discharged exhaust' 'g'ases'-afterthe' 'same'have passed through the-outlet of the hot gas chamber and'have'le-ft the latter for operating thevalve tocontrolth'e passage of the exhaust gases through the said outlet and the teniperature of the inlet pipe.

'6. A temperature controlling device for internal combustion engines including an in" let pipe located betweemthe carburetor and the engine, afh'ot gas chamber surrounding the inlet pipe and provided atone side with an inlet and atthe opposite-side with an outlet adapted-to cause the hot gases to entirely envelope the inlet. pipe, an exhaust pipe in sulated from'the-engine to prevent radiation of heat from the exhaustpipe to any partof;

the engine, saidexhaust pipe havingmeans for connectingit "with the inlet of the said I chamber, meansforcutting on? the exhaust. gases entirely from the hot gas chamber when required, and automatic means arranged eX- teriorly of the hot gas chamber and located;

beyond the said 'outletin the direct path-of and regulated by theex'hau'st 'gasesfdischar-ging from -sa'i'd chamber afterthes'aid gases ha've'pa-ssed tl'irough the outlet of the chamber and left the-latter for'controlling the passage o f-the exhaust gases through theoutlet and the temperatu're'of the inlet pipe.

. A temperaturecontrolling device for internal combustion engines including a-thin walled i-nlle'tpipe, a hot-gaschambersurrounding the inlet pipeandha'ving relatively thick walls and provided at one side with an inlet" andat the opposite side with an outlet,- means for introducing-hot exhaust gases into said chamber 'fer heating the inlet pipe'and for controlling the: passage ofsaid-gases-to the chamber so that in extreme conditions all of the. exhaust gases may be delivered to the hot gas chambe'ror excluded therefrom, and auto-7 mati'c means "located'exteriorly of the hot gas 5 chamber beyond the said outletinthedirect pathof and regulated by the exhaust gases discharging therefrom after said gases have left the saidchamber through the said outlet for controlling the passage o'fthe-said gases the inletpipe f #8; A temperature :controlling device for through the-outlet and the temperature of '1 ing connected with'and actuating the valve of the discharge pipe for controlling the passage ternal combustion engines includingan inlet pipe located between the carburetorand the engine, a hot gas chamber surrounding the inlet pipe and provided at the upper portion at one side with an inlet and having a lateral enlargement at the bottom at the opposite side provided with an outlet, a discharge pipe leading from the outlet of the said enlargement, avalve located in the discharge pipe exteriorly of the enlargement, and a thermostat also located in the discharge pipe exterior of the said chamber and the enlargement thereoi and arranged in the direct path of the exhaust gases passing from the said chamher, said thermostat being connected with and actuating the valve for controlling the passage of the exhaust gases through the outlet and the temperature of theinlet pipe.

1 9. A temperature controlling device for internal combustion engines including an inlet pipe located between the carburetor and engine, a hot gas chamber surrounding the inlet pipe and provided at the upper portion at one side with an inlet-and at the opposite side at the bottom with'an enlargement having a bottom outlet, an exhaust pipe having a bracket connected with the inlet of the hot gas chamber and providedwith a valve for controlling'the passage of all of the exhaust gases to cause the same orany amount thereof to pass to the hot gas chamber and to exclude all of the exhaust gases therefrom when required, a discharge pipe depending from the said enlargement of the hot gas chamber 1 at the bottom outlet thereof, a valve located exteriorly ofthe enlargement and operating in the'discharge pipe, and a thermostat also located exteriorlyot-the enlargement and arranged in the discharge pipe .in the direct path of the exhaust gases, said thermostat beof the exhaustvgases through the outlet and the temperature of the inlet pipe. 10, A temperature controlling device for internal combustion engines including an inlet pipe located between the carburetor and the engine, a hot gas chamber surrounding the inlet pipe and carrying a section thereof and provided at one side at the upper portion with an inlet and at the opposite side at the bottom with a lateral enlargement having a bottom outlet, an exhaust pipe having a bracket connected with the inlet of the hot gas chamberand provided with a valve for controlling the passage of the exhaust gases to the chamber, a discharge pipe depending fromthe enlargement and surroundingthe outlet thereof and provided with-an upper guiding portion and having a lower supporting lug, a valve cooperating with the outlet and operating in theguiding portion of the discharge pipe, and a thermostat mounted upon the said lug and connected with the valve'and adapted to actuatethe same for controlling. 

